This weekend marks the 100th anniversary of the sinking of the Titanic. Four days into her maiden Atlantic crossing, at 11:40 pm on April 14, the ship collided with an iceberg. She sank less than three hours later. Of the 2,223 passengers and crew on board, 1,517 died.

The 705 survivors were taken aboard the Carpathia, which docked in New York City April 18. (I've seen sources numbering survivors anywhere from 700 to 710, but I most often found 705.)

Several parts of the world are observing the anniversary: Belfast, where Titanic was constructed; Southampton, England, whence she departed and home to most of her crew; Halifax, Nova Scotia, where the dead were transported and 150 victims rest; and the United States, where the ship was to dock in New York.

This is a great time to learn more about the Titanic and those on board, especially if a passenger or crew member is on your family tree. These are some of our favorite Titanic genealogy and history resources:

FindMyPast.co.uk Titanic records: This British subscription/pay-per-view site recently published a collection of maritime birth, marriage and death records, which name Titanic crew members and passengers who died at sea. Also new are the White Star Line officers' books containing service records of officers and commanders on the Titanic and other White Star Line vessels.